[Demonstration 1]

[Buggy Method]
public static void main(String[] args) {
    File inputFile = new File(args[1]);
    int msize;
    int asize;
    try {
        Scanner sc = new Scanner(inputFile);
        //grab the memory size and min block size
        String[] line = sc.nextLine().split(" ");
        msize = Integer.parseInt(line[0]);
        asize = Integer.parseInt(line[1]);
        memory = new BuddySystemMemory(asize, msize);
        while (sc.hasNextLine()) {
            line = sc.nextLine().split(" ");
            AllocationRequest aRequest;
            DeallocationRequest dRequest;
            if (line[1].equals("+")) {
                aRequest = new AllocationRequest(Integer.parseInt(line[0]), Integer.parseInt(line[2]));
                memory.allocate(aRequest);
            } else if (line[1].equals("-")) {
                dRequest = new DeallocationRequest(Integer.parseInt(line[0]));
                memory.deallocate(dRequest);
            }
        }
        sc.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
}

[Buggy Hunk]
File inputFile = new File(args[1]);

[Patch]
File inputFile = new File(args[0]);

[Demonstration 2]

[Buggy Method]
public static List<File> findFiles(final String fileExtension) {
    List<File> files = new LinkedList<File>();
    try {
        URL url = FileUtils.class.getClassLoader().getResource("/");
        if (url == null)
            return files;
        String protocol = url.getProtocol();
        if ("file".equals(protocol)) {
            // 如果是以文件的形式保存在服务器上
            // 获取包的物理路径
            String filePath = URLDecoder.decode(url.getFile(), "UTF-8");
            File dir = new File(filePath);
            if (!dir.exists() || !dir.isDirectory())
                return files;
            File[] targetFiles = dir.listFiles(new FileFilter() {

                public boolean accept(File file) {
                    return file.getName().endsWith(fileExtension);
                }
            });
            if (!JwUtils.isEmpty(targetFiles)) {
                files.addAll(Arrays.asList(targetFiles));
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
    return files;
}

[Buggy Hunk]
URL url = FileUtils.class.getClassLoader().getResource("/");

[Patch]
URL url = FileUtils.class.getResource("/");

[Demonstration 3]

[Buggy Method]
public static Result service(String ownerName, String projectName, String service, boolean isAdvertise) throws IOException, UnsupportedOperationException, ServletException {
    if (!isSupportedService(service)) {
        return forbidden(String.format("Unsupported service: '%s'", service));
    }
    Project project = Project.findByOwnerAndProjectName(ownerName, projectName);
    if (project == null) {
        return notFound();
    }
    models.User user = UserApp.currentUser();
    if (!isAllowed(project, service)) {
        if (user.isAnonymous()) {
            return BasicAuthAction.unauthorized(response());
        } else {
            // If you want the Git client showing your custom message to
            // the user, the Content-Type should be exact "text/plain"
            // without any parameter. For more details, see the code at
            // https://github.com/git/git/commit/426e70d4a11ce3b4f70636d57c6a0ab16ae08a00#diff-eea0ad565ec5903a11b6023755d491cfR154
            response().setHeader("Content-Type", "text/plain");
            return forbidden(String.format("'%s' has no permission to '%s/%s'.", user.name, ownerName, projectName));
        }
    }
    if (isAdvertise) {
        return ok(RepositoryService.gitAdvertise(project, service, response()));
    } else {
        if (request().body().isMaxSizeExceeded()) {
            return status(REQUEST_ENTITY_TOO_LARGE);
        } else {
            user.visits(project);
            return ok(RepositoryService.gitRpc(project, service, request(), response()));
        }
    }
}

[Buggy Hunk]
user.name, ownerName, projectName));

[Patch]
user.loginId, ownerName, projectName));